What does P1819 mean on a Ford?

P1819. Transmission Neutral Safety Switch Short to Ground. Applies to F-150, Ranger, Explorer.

What causes P1819 on a Ford?

Neutral safety wire shorted to ground Failed switch shorting internally Chafed harness on the transmission Corroded connector Module fault

How do I fix P1819 on a Ford?

Test for the short with the switch disconnected Inspect transmission harness routing Test switch operation Clean the connector Repair wiring or replace the switch

Code

P1819

Transmission Neutral Safety Switch Short to Ground

Category: Powertrain - Transmission
Severity: Check Engine Light
Applies to: F-150, Ranger, Explorer
Related: P0705 Transmission Range Sensor A Circuit (PRNDL Input) on OBD Codes List

Findings, check these first

Neutral safety wire shorted to ground
Failed switch shorting internally
Chafed harness on the transmission
Corroded connector
Module fault

Standard procedure

Test for the short with the switch disconnected
Inspect transmission harness routing
Test switch operation
Clean the connector
Repair wiring or replace the switch

Code lookup

Type a code above, or start from a symptom or a common code.

Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.

Sources and review

Review: checked against the recorded source material.

OBDII.pro: P1819 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1819: Transmission Neutral Safety Switch Short Circuit To Ground
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
P1819 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1819: Transmission Neutral Safety Switch Short Circuit To Ground
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.

Last updated 2026-09-06.

Report a correction for P1819. Include your vehicle, the issue and a source if you have one.